检索结果-南通市图书馆

Benefitting from Geoinformatics: Estimating Floristic Diversity of Warwan Valley in Northwestern Himalaya,India

Journal of Mountain Science 2015年第4期12卷 854-863页

作者： Akhtar Hussain malik Irfan RASHID Aijaz Hassan GANIE Anzar ahmad KHUROO Ghulam Hassan DAR Centre for Biodiversity and Taxonomy Department of Botany University of Kashmir Department of Earth Sciences University of Kashmir Department of Botany University of Kashmir Mahatma Gandhi Chair on Ecology and Environment Centre for Biodiversity Studies Baba Ghulam Shah Badshah University

The Himalaya harbor rich floristic diversity which is of immense scientific interest and socio-economic *** this study, floristic diversity of a remote alpine valley has been studied based on information extracted from remotely sensed satellite data along with field surveys undertaken during *** of vegetation information from satellite data revealed that ~75% of the area is covered with natural vegetation which comprises lush green coniferous forests, alpine pastures and alpine scrub *** inputs from vegetation information extracted from satellite data, comprehensive field surveys were planned to document the floristic diversity of the *** of species composition showed a total of 285 plant species,belonging to 191 genera in 60 *** these, 250 species are herbs, 14 shrubs, 2 sub-shrubs and 19 *** dicotyledons are represented by 240 species, monocotyledons 30, gymnosperms 04, andpteriodophytes 11 *** is the largest family with 35 *** the present study, 5species（Corydalis cashmeriana, Hippophae rhamnoides, Primula minutissima, Saussurea sacra and Inula orientalis） have been recorded for the first time from this Himalayan *** study demonstrates the benefits of geo-informatics in floristic studies, particularly the robustness of remotely sensed data in identifying areas with potentially high species richness, which would be otherwise difficult in a complex mountainous terrain using traditional floristic surveys *** present study is expected to provide baseline scientific data for cutting edge studies relating to long term ecological research, bioprospecting, possible impacts of changing climate on vegetation and sustainable use of plant resources in this Himalayan region.

关键词： Floristic diversity Northwestern Himalaya Remote sensing GIS Vegetation sampling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Photometry and spectroscopy ofⅡPeg,IM Peg and UX Ari

引用

Research in Astronomy and Astrophysics 2018年第9期18卷 79-88页

作者： Ajaz ahmad Dar Padmakar Singh Parihar Manzoor ahmad malik Department of Physics University of KashmirHazratbal 190006 Srinagar-J&KIndia Department of Physics Islamia College of Science and CommerceHawalSrinagar-19002J&KIndia Indian Institute of Astrophysics Koramagala-560034BangaloreIndia

Ⅴ band photometry of three RS CVn stars,Ⅱ Peg, IM Peg and UX Ari, is carried out to study the physical properties of these variables. We verified the significant and regular optical photometric variability to be present in all three stars. The strong photometric variability and emission of Hα and Ca Ⅱ H ＆ K using high resolution optical spectroscopy with the Hanle Echelle Spectrograph （HESP）, which operates in conjunction with the Himalayan Chandra Telescope, verify the strong chromospheric activity which is present in RS CVn stars. The photometric studies of Ⅱ Peg, UX Ari and IM Peg were subjected to light curve analysis for spot parameters using a two-starspot model.

关键词： RS CVn star spots chromospherically active

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

凉山州地质灾害发育特征与时空分布规律

引用

沉积与特提斯地质 2024年第3期44卷 478-492页

作者：徐伟铁永波郑玄殷万清付小麟欧文白永健 Ireneusz malik Małgorzata Wistuba 中国地质调查局成都地质调查中心(西南地质科技创新中心) 四川成都610218 自然资源部地质灾害风险防控工程技术创新中心四川成都611734 自然资源部成都地质灾害野外科学观测研究站四川成都610000 凉山州地质环境监测站四川西昌615000 四川省国土空间生态修复与地质灾害防治研究院四川成都610081 卡托维兹西里西亚大学地球科学研究所波兰卡托维兹41-200

凉山州地处横断山系东北缘、川滇构造带南段,受活动构造、地形地貌、河流切割等作用影响,发育有地质灾害总数4016处,以中、小型土质滑坡和中、小型沟谷泥石流为主,是四川省地质灾害高风险地区。本文采用资料收集、数理统计、ArcGIS软件... 详细信息

凉山州地处横断山系东北缘、川滇构造带南段,受活动构造、地形地貌、河流切割等作用影响,发育有地质灾害总数4016处,以中、小型土质滑坡和中、小型沟谷泥石流为主,是四川省地质灾害高风险地区。本文采用资料收集、数理统计、ArcGIS软件分析等方法分析发现,按行政区分析,德昌县是地质灾害发育数量最多的县市,为387处;宁南县是灾害发育密度最高的县市,为17.7处/100 km^(2);按流域分析,安宁河流域的地质灾害数量最多,达779处;美姑河流域的灾害发育密度最高,达11.18处/100 km^(2)。以灾害发育密度为指标对不同灾害类型地质灾害的空间分布进行分析,滑坡方面,划分为4个极高密度区和15个高密度区,滑坡发育受活动构造、易滑地层(红层、昔格达组等)控制作用影响较大;崩塌方面,划分为2个极高密度区和5个高密度区,崩塌沿河谷及支沟、活动构造呈带状分布,受水电站库区开发建设、公路建设等工程活动切坡影响较大;泥石流方面,划分为2个极高密度区和10个高密度区,泥石流发育受构造断裂、地形地貌和人类工程活动影响较大。研究成果可为凉山州的防灾减灾工作提供数据支撑和科学参考。

关键词：地质灾害发育特征时空分布规律

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The charge state distribution of B, C, Si, Ni, Cu and Au ions on 5 MV pelletron accelerator

引用

Nuclear Science and Techniques 2017年第5期28卷 43-47页

作者： Ali Awais Javaid Hussain Muhammad Usman Waheed Akram Kashif Shahzad Turab Ali Ishaq ahmad malik Maaza Experimental Physics Laboratories National Centre for Physics Islamabad 44000 Pakistan UNESCO-UNISA Africa Chair in Nanosciences/ Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge PO Box 392 PretoriaSouth Africa Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation 1 Old Faure RoadPO Box 722 Somerset West Western Cape Province 7129South Africa

Stripper gas and terminal potential play a key role for the charge state distribution in a tandem pelletron accelerator. The knowledge of this distribution is important for experiments performed on tandem accelerators. The charge state distribution of B, C, Si, Ni, Cu and Au beams is measured by using Ar as stripper gas, and terminal potential is varied from 0.3 to 3.0 MV on 5UDH-2 tandem pelletron accelerator installed at the National Centre for Physics, Islamabad. The individual charge state is measured after the switching magnet at 15° in high-energy portion. It is observed that the higher charge states are stable in the range of lower and middle atomic masses of periodic table, whereas higher atomic mass(Au) shows beam current instability in higher charge states. For carbon,the charge distribution at 1.7 MV terminal potential by varying stripper gas pressure is also studied, which resulted in decreased overall transmission with good current value for higher charge states.

关键词： Pelletron accelerator Charge state distribution Stripper gas Terminal potential

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mn(Ⅱ)和Ce(Ⅳ)离子对铬酸氧化乳酸的影响(英文)

引用

物理化学学报 2007年第7期23卷 1013-1017页

作者： malik Maqsood ahmad KHAN Zaheer Department of Chemistry Jamia Millia Islamia(Central University)New Delhi 110025India

The kinetics and mechanism of lactic acid oxidation in the presence of Mn(II)and Ce(IV)ions by chromic acid were studied *** oxidation of lactic acid by Cr(VI)was found to proceed in two measurable steps,both of which gave pyruvic acid as the primary product in the absence of Mn(II).2Cr(VI)+2CH3CHOHCOOH→2CH3COCOOH+Cr(V)+Cr(III)Cr(V)+CH3CHOHCOOH→Cr(III)+CH3COCOOH The observed kinetics was explained due to the catalytic and inhibitory effects of Mn(II)and Ce(IV)on the lactic acid oxidation by Cr(VI).The reactivity of lactic acid depends upon the experimental *** acts as a two-or three-equivalent reducing agent in the absence or presence of Mn(II).It was examined that Cr(III)products resulting from the direct reduction of Cr(VI)by three-equivalent reducing *** oxidation of lactic acid follows the complex order kinetics with respect to [lactic acid].The activation parameters Ea,ΔH#,and ΔS# were calculated and discussed.

关键词：乳酸反应动力学铬锰铈氧化铬酸

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Proteome-wide screening for the analysis of protein targeting of Chlamydia pneumoniae in endoplasmic reticulum of host cells and their possible implication in lung cancer development

引用

BIOCELL 2022年第1期46卷 87-95页

作者： YANYAN LI SHAHANAVAJ KHAN ANIS ahmad CHAUDHARY HASSAN AHMED RUDAYNI ABDUL malik ASHWAG SHAMI Department of Oncology Zhengzhou Central Hospital Affiliated to Zhengzhou UniversityZhengzhou450007China Department of Pharmaceutics College of PharmacyKing Saud UniversityRiyadh11451Saudi Arabia Department of Biosciences Shri Ram Group of College(SRGC)Muzaffarnagar251001India Department of Health Sciences Novel Global Community Educational FoundationSydneyAustralia Department of Biology College of ScienceImam Mohammad Ibn Saud Islamic University(IMSUI)Riyadh11623Saudi Arabia Department of Biology College of SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11617Saudi Arabia

Available reports have confirmed a link between bacterial infection and the progression of different types of cancers,including colon,lungs,and prostate *** we report the Chlamydia pneumonia proteins targeting in endoplasmic reticulum(ER)using in-silico approaches and their possible role in lung cancer *** predicted 48 proteins that target human ER,which may be associated with protein folding and protein-protein interactions during *** results showed *** proteins targeting human ER and their implications in lung cancer *** targeted proteins may be involved in competitive interactions between host and bacterial proteins,which may change the usual pathway functions and trigger the development of lung ***,*** unfolded protein accumulation in the human ER possibly induces ER stress,consequently activating the unfolded protein response(UPR),and providing a favorable microenvironment for cancer *** current study showed the *** protein targeting in ER of host cell and their implication in lung cancer *** results may help researchers better manage lung cancer and establish a molecular mechanism for *** lung cancer association.

关键词： Bacterial infection C.pneumoniae Proteomes ER Lung cancer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Economic and Social Impact Assessment of Chronic Diseases Among the Low-Income Population in Southern Punjab,Pakistan

引用

Proceedings of Anticancer Research 2024年第4期8卷 67-74页

作者： Mehran Khan Muhammad Arbab Nasir Muhammad Umar Asadullah Faiz Mirza Muhammad Abdul Bari Ayesha Saeed Fiza Nazeer Khan Saliha Mehboob malik Akashah Usama Tayyab Bahawalpur College of Pharmacy BMDC Complex63100BahawalpurPunjabPakistan

Introduction:Chronic diseases are becoming more prevalent *** effects of chronic illnesses are disastrous not only for the diagnosed person but also for their entire *** study explores chronic diseases’social and economic impact on low-income *** study aims to determine the economic and social implications of various chronic diseases and the loss of income due to these conditions among low-income individuals in Southern Punjab,***:A sample of 424 patients was selected from different areas of Southern *** were collected using a questionnaire that included questions about economic status,self-reported health status,social status,management strategies,and health insurance,among other ***:The mean monthly income of the respondents was found to be 57,097.6 Pakistani rupee(PKR),and the mean monthly expenses for treatment were 8,256.1 *** loss of income was calculated at 15%.Additionally,62%of patients spent more than 10%of their monthly income on managing their *** 85%of the respondents reported that chronic diseases affected their social ***,80%of patients lacked health ***:Chronic diseases impose significant economic and social burdens on patients and their families in Southern *** reduce the burden of chronic diseases,the government should enhance healthcare services in this region and provide health insurance to low-income families.

关键词： Chronic diseases Low-income families Economic impact Punjab Pakistan

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Notch signalling pathway in development of cholangiocarcinoma

引用

World Journal of Gastrointestinal Oncology 2020年第9期12卷 957-974页

作者： Bisma Rauff Arif malik Yasir Ali Bhatti Shafiq ahmad Chudhary Ishtiaq Qadri Shafquat Rafiq Institute of Molecular Biology and Biotechnology University of LahoreLahore 54000Pakistan Institute of Biomedical and Allied Health Sciences University of Health SciencesLahore 54000Pakistan Department of Biology Faculty of ScienceKing Abdulaziz University Jeddah Kingdom of Saudi Arabia Department of Gastrointestinal medicine Croydon University HospitalCroydon CR77YEUnited Kingdom

Cholangiocarcinoma(CCA)comprises of extra-hepatic cholangiocarcinoma and intrahepatic cholangiocarcinoma cancers as a result of inflammation of epithelium cell lining of the bile *** incidence rate is increasing dramatically worldwide with highest rates in Eastern and South Asian *** risk factors involve chronic damage and inflammation of bile duct epithelium from primary sclerosing cholangitis,chronic hepatitis virus infection,gallstones and liver fluke *** genetic variants have also been identified and as CCA develops on the background of biliary inflammation,diverse range of molecular mechanisms are involved in its *** these,the Notch signalling pathway acts as a major driver of cholangiocarcinogenesis and its components(receptors,ligands and downstream signalling molecules)represent a promising therapeutic ***-Secretase Inhibitors have been recognized in inhibiting the Notch pathway efficiently.A comprehensive knowledge of the molecular pathways activated by the Notch signalling cascade as well as its functional crosstalk with other signalling pathways provide better approach in developing innovative therapies against CCA.

关键词： Cholangicarcinoma Notch receptors Therapeutic targets Notch signalling pathway Gamma secretase inhibitor Cholangiocytes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Air traffic monitoring using optimized ADS-B CubeSat constellation

引用

Astrodynamics 2024年第1期8卷 189-208页

作者： Ghulam Jaffer Rameez Amalik Elias Aboutanios Nazish Rubab Ronnie Nader Hans U.Eichelberger Guy A.E.Vandenbosch Interdisciplinary Centre for Security Reliability and Trust(SnT)University of LuxembourgLuxembourg1855Luxembourg

The primary technique used for air traffic surveillance is ***,nowadays,its role in surveillance is gradually being replaced by the recently adopted Automatic Dependent Surveillance-Broadcast(ADS-B).ADS-B offers a higher accuracy,lower power consumption,and longer range than radar,thus providing more safety to *** coverage of terrestrial radar and ADS-B is confined to continental parts of the globe,leaving oceans and poles uncovered by real-time surveillance *** study presents an optimized Low-Earth Orbit(LEO)-based ADS-B constellation for global air traffic surveillance over intercontinental trans-oceanic flight *** optimization algorithm is based on performance evaluation parameters,i.e.,coverage time,satellite availability,and orbit stability(precession and perigee rotation),and communication *** results indicate that the constellation provides ample coverage in the simulated global oceanic *** constellation is a feasible and cost-effective solution for global air supervision,which can supplement terrestrial ADS-B and radar systems.

关键词： constellation automatic dependent surveillance-broadcast (ADS-B) air traffic surveillance precession perigee rotation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Antibacterial mechanism with consequent cytotoxicity of different reinforcements in biodegradable magnesium and zinc alloys: A review

引用

Journal of Magnesium and Alloys 2023年第9期11卷 3038-3058页

作者： Chowdhury Ahmed Shahed Faiz ahmad Ebru Günister Farhana Mohd Foudzi Saad Ali Khurshid malik Wan Sharuzi Wan Harun Department of Mechanical Engineering Universiti Teknologi PETRONAS(UTP)32610Seri IskandarPerakMalaysia Faculty of Engineering and Natural Sciences Department of Mechanical EngineeringIstanbul Health and Technology UniversityIstanbulTurkey Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Faculty of Mechanical&Automotive Engineering Technology Universiti Malaysia Pahang26600 PekanPahangMalaysia

Benefits achieved by the biodegradable magnesium(Mg) and zinc(Zn) implants could be suppressed due to the invasion of infectious microbial, common bacteria, and fungi. Postoperative medications and the antibacterial properties of pure Mg and Zn are insufficient against biofilm and antibiotic-resistant bacteria, bringing osteomyelitis, necrosis, and even death. This study evaluates the antibacterial performance of biodegradable Mg and Zn alloys of different reinforcements, including silver(Ag), copper(Cu), lithium(Li), and gallium(Ga). Copper ions(Cu^(2+)) can eradicate biofilms and antibiotic-resistant bacteria by extracting electrons from the cellular structure. Silver ion(Ag^(+)) kills bacteria by creating bonds with the thiol group. Gallium ion(Ga^(3+)) inhibits ferric ion(Fe^(3+)) absorption, leading to nutrient deficiency and bacterial death. Nanoparticles and reactive oxygen species(ROS) can penetrate bacteria cell walls directly, develop bonds with receptors, and damage nucleotides. Antibacterial action depends on the alkali nature of metal ions and their degradation rate, which often causes cytotoxicity in living cells. Therefore, this review emphasizes the insight into degradation rate, antibacterial mechanism, and their consequent cytotoxicity and observes the correlation between antibacterial performance and oxidation number of metal ions.

关键词： Biodegradable materials Biomedical implants Antibacterial mechanism Cytotoxicity Reactive oxygen species

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：